There are some collections of simple core and flake stone artifacts collected by C. Thibault in 1974-75. The tools are Olduwan-like and mainly made of quartz. Thibault suggested a Lower Pleistocene age (more than 800,000 years ago) for the localities.The lithic assemblages were re-analyzed in National Museum of Iran and the results are published in a general synthesis about Iranian Lower Paleolithic (look at Biglari and Shidrang 2006)